assert.deepEqual and assert.deepStrictEqual currently return true for
any pair of Maps and Sets regardless of content. This patch adds
support in deepEqual and deepStrictEqual to verify the contents of Maps
and Sets.
Deeo equivalence checking is currently an
O(n^2) operation, and worse, it gets slower exponentially if maps
and sets were nested.
Note that this change breaks compatibility with previous versions of
deepEqual and deepStrictEqual if consumers were depending on all maps
and sets to be seen as equivalent. The old behaviour was never
documented, but nevertheless there are certainly some tests out there
which depend on it.
Support has stalled because the assert API was frozen, but was recently
unfrozen in CTC#63.
---
Later squashed in:
This change updates the checks for deep equality checking on Map and Set
to check all set values / all map keys to see if any of them match the
expected result.
This change is much slower, but based on the conversation in the pull
request its probably the right approach.
Fixes: https://github.com/nodejs/node/issues/2309
Refs: https://github.com/substack/tape/issues/342
Refs: https://github.com/nodejs/node/pull/2315
Refs: https://github.com/nodejs/CTC/issues/63
PR-URL: https://github.com/nodejs/node/pull/12142
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Joseph Gentle
6481c93aef